Sphenodontia
Rhynchocephalia is an order of lizard-like reptiles that includes only one living genus and species, the tuatara (Sphenodon punctatus), which only inhabits parts of New Zealand. Despite its current la...
Sphenodontia - Wikipedia
Homoeosaurus
Homeosaurus is an extinct genus of sphenodont reptile. It was found in limestone in Bavaria, Germany, and looks similar to the modern tuatara, to which it is closely related.
Homoeosaurus - Wikipedia
Gephyrosauridae
Gephyrosauridae was a family of sphenodonts that lived in the Late Triassic and Early Jurassic. The members of Gephyrosauridae were named lepidosaurs in 1985 by Michael Benton.
The members of Geph...
Gephyrosauridae - Wikipedia
Zapatadon
Zapatadon is an extinct genus of sphenodontid reptile from the end of the Early Jurassic in the lower part of La Boca Formation of Tamaulipas, Mexico. Is known from a nearly complete skull with mandib...
Sphenodontinae
Tuatara are reptiles endemic to New Zealand and which, although resembling most lizards, are part of a distinct lineage, the order Rhynchocephalia. The two species of tuatara are the only surviving me...
Sphenodontinae - Wikipedia
Pleurosaurus
Pleurosaurus is an extinct genus of diapsid reptiles belonging to the group Sphenodontia, extinct relatives of the modern tuatara. Pleurosaurus fossils were discovered in the Solnhofen limestone forma...
Pleurosaurus - Wikipedia
Toxolophosaurus
Toxolophosaurus was a Sphenodontid from the Early Cretaceous–age Kootenai Formation of Montana.
Toxolophosaurus cloudi was found by Olson in 1960 in the Kootenai Formation, 223.75 feet above the b...
Clevosaurus
Clevosaurus (CLEE-vo-SORE-us) ("Gloucester lizard") is an extinct genus of sphenodontian reptile from the Triassic and the Jurassic periods of Nova Scotia, Great Britain, (C. bairdi) and Yunnan (C. mc...
Clevosaurus - Wikipedia
Godavarisaurus
Godavarisaurus was a sphenodontid reptile from the Early Jurassic (Hettangian - Pliensbachian) Kota Formation of Andhra Pradesh, India.
Godavarisaurus - Wikipedia
Pleurosauridae
Pleurosauridae is a family of extinct marine diapsid reptiles belonging to the group Sphenodontia. Fossils from this family have been discovered in Bavaria, Germany from the Toarcian (Early Jurassic) ...
Pleurosauridae - Wikipedia
Brachyrhinodon
Brachyrhinodon is an extinct genus of sphenodontian from the Triassic of Scotland .
Brachyrhinodon - Wikipedia
Planocephalosaurus
Planocephalosaurus is an extinct genus of diapsid reptile belonging to the Order Sphenodontia.Planocephalosaurus was one of the first sphenodonts and bore a strong resemblance to the extant tuatara, a...
Opisthias
Opisthias is a Late Jurassic genus of sphenodont reptile from the Morrison Formation of western North America, present in stratigraphic zones 2 and 4-6.
Opisthias was from the  United States ...
Pamizinsaurus
Pamizinisaurus is a genus of sphenodontian reptile known from Lower Cretaceous (Albian) Tlayúa Formation of Mexico. A crushed skeleon of a juvenile reptile was found in Tlayua Quarry, in central Mex...
Sigmala
Sigmala was a reptile from the Late Triassic.
Sigmala lived in the  United Kingdom.
Gephyrosaurus
Gephyrosaurus is a genus of early Rhynchocephalia. They are distantly related to the extant Sphenodon (tuatara of New Zealand) with which they shared a number of skeletal features including a large to...
Leptosaurus
Leptosaurus (also known as Kallimodon) was a Sphenodontid from the Mesozoic Era.
Leptosaurus was named a member of the Sphenodontidae family by Renesto and Viohl in 1997.
Leptosaurus - Wikipedia
Cynosphenodon
Cynosphenodon (/ˌsaɪnəˈsfɛnədɒn/ SY-nə-SFEN-ə-don; "Dog Sphenodontian") is an extinct genus of the family Sphenodontidae from the Middle Jurassic La Boca Formation of Tamaulipas, Mexico. Growth patte...
Palaeopleurosaurus
Palaeopleurosaurus is an extinct genus of diapsid reptiles belonging to the group Sphenodontia. Palaeoleurosaurus fossils were discovered in Bavaria, Germany from Toarcian (Early Jurassic) deposits, d...
Palaeopleurosaurus - Wikipedia
Rhynchocephalia
Rhynchocephalia is an order of lizard-like reptiles that includes only one living genus and species, the tuatara (Sphenodon punctatus), which only inhabits parts of New Zealand. Despite its current la...
Rhynchocephalia - Wikipedia
Sapheosaurus
Sapheosaurus (also known as Piocormus) was a sphenodontid of the suborder Homoeosauria, although its skull was longer and narrower than that of Homoeosaurus. It was classified as a genus of sapheosau...
Sapheosaurus - Wikipedia
Eilenodon
Eilenodon is a Late Jurassic genus of sphenodont reptile from the Morrison Formation of western North America, present in stratigraphic zone 4.
Tuatara
Tuatara are reptiles endemic to New Zealand and which, although resembling most lizards, are part of a distinct lineage, the order Rhynchocephalia. The two species of tuatara are the only surviving me...
Tuatara - Wikipedia
Diphydontosaurus
Diphydontosaurus was a sphenodontian reptile from the Late Triassic of England and Italy. This small animal was related to the living tuatara (Sphenodon). Diphydontosaurus may have hunted and eaten in...
Diphydontosaurus - Wikipedia
Rebbanosaurus
Rebbanosaurus is a genus of sphenodontid reptile that lived during the Early Jurassic in what is now India. It was described by Evans, 2001.
Rebbanosaurus - Wikipedia
Theretairus
Theretairus is a Late Jurassic genus of sphenodont reptile from the Morrison Formation of western North America, present in stratigraphic zones 5 and 6.